The US patent might be a bit daft, especially when it comes to software, but it does offer some interesting insights into what crazy things the big companies might be working on for future products. One such patent emerged today: Microsoft applied in 2005 (and was granted in 2008) a patent which describes how different windows may be coloured differently, or that they may have different transparency settings. This sounds a bit weird, but it may actually prove to be quite useful.